Full field development for a sandstone reservoir of complex structure has been studied using PETREL for building geological model, Eclipse 100 for black oil simulator and Eclipse 300 for compositional simulator. The FZI method that was adopted in this study is a viable methodology to distinguish rock types in the reservoir. Distinguishing the rock types gave us the privilege to calculate the permeability in each grid cell based on the cell porosity and rock type. Initial water saturation was calculated for each grid cell using the J-function algorithm based on rock type. Relative permeability curves were distributed in the simulation model based on rock type, and the end points of these relative permeability curves were modified to fit the rock type based on its FZI value. Seven scenarios were studied in this dissertation; the base case, water flooding, SWAG, infill drilling, low salinity injection, polymer injection, and CO2 injection. After comparison in oil recovery between all scenarios, CO2 injection gave the best oil recovery; 49.1% of the original oil in place. Even though CO2 injection gave a value of 49.1% oil recovery from the original oil in place, low salinity injection gave a value of 40.1% oil recovery from the original oil in place and it has the best economic viability. CO2 injection gave a net present value of $313.96 MM for the 10-year simulation cycle, while low salinity injection gave a net present value of $382.37 MM.